package cn.tedu.charging.order.config;

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.DirectExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.HashMap;
import java.util.Map;

@Configuration
public class RabbitMQConfiguration {

    /**
     * 正常exchange 正常队列 正常路由key
     */
    public static final String EXCHANGE_NAME = "charging_order_exchange";
    public static final String ROUTING_KEY = "charging_order_routing_key";
    private static final String QUEUE_NAME = "charging_order_queue";


    /**
     * 死信 exchange 死信 队列 死信 路由key
     */
    public static final String DEAD_LETTER_EXCHANGE_NAME = "dead_letter_charging_order_exchange";
    public static final String DEAD_LETTER_ROUTING_KEY = "dead_letter_charging_order_routing_key";
    public static final String DEAD_LETTER_QUEUE_NAME = "dead_letter_charging_order_queue";




    /**
     * 通过Spring @Bean 方式 创建 DirectExchange
     * Direct 是Exchange的一种类型
     * @return
     */
    @Bean
    public DirectExchange directExchange() {
        //消息持久化
        Boolean durable = true;
        //队列是否自动删除
        Boolean autoDelete = false;
        return new DirectExchange(EXCHANGE_NAME,durable,autoDelete);
    }

    /**
     * 通过Spring @Bean 方式 创建 Queue
     * 原生 channel.queueDeclare
     * @return
     */
    @Bean
    public Queue orderQueue() {
        Map<String,Object> args = new HashMap<>();
        //模拟时间 设置消息的TTl 为两分钟 模拟充电充满需要2分钟
        Integer ttl = 2 * 60 * 1000;
        args.put("x-message-ttl",ttl);
        //设置正常队列的死信队列的Exchange
        args.put("x-dead-letter-exchange",DEAD_LETTER_EXCHANGE_NAME);
        //设置正常队列的死信队列的RoutingKey
        args.put("x-dead-letter-routing-key",DEAD_LETTER_ROUTING_KEY);
        //消息持久化
        Boolean durable = true;
        //互斥 连接级别的互斥
        Boolean exclusive = false;
        //队列是否自动删除
        Boolean autoDelete = false;

        return new Queue(QUEUE_NAME,durable,exclusive,autoDelete,args);
    }

    /**
     * 通过Spring @Bean 方式
     * 把Exchange 和 Queue 通过 routingKey 绑定
     * @return
     */
    @Bean
    public Binding orderBind() {
        return BindingBuilder.bind(orderQueue()).
                to(directExchange()).with(ROUTING_KEY);
    }


    /**
     * 通过Spring @Bean 方式 创建 DirectExchange
     * Direct 是Exchange的一种类型
     * @return
     */
    @Bean
    public DirectExchange deadLetterDirectExchange() {
        //消息持久化
        Boolean durable = true;
        //队列是否自动删除
        Boolean autoDelete = false;
        return new DirectExchange(DEAD_LETTER_EXCHANGE_NAME,durable,autoDelete);
    }

    /**
     * 通过Spring @Bean 方式 创建 Queue
     * 原生 channel.queueDeclare
     * @return
     */
    @Bean
    public Queue deadLetterOrderQueue() {
        //消息持久化
        Boolean durable = true;
        //队列是否自动删除
        Boolean autoDelete = false;
        return new Queue(DEAD_LETTER_QUEUE_NAME,durable,false,autoDelete);
    }

    /**
     * 通过Spring @Bean 方式
     * 把Exchange 和 Queue 通过 routingKey 绑定
     * @return
     */
    @Bean
    public Binding deadLetterOrderBind() {
        return BindingBuilder.bind(deadLetterOrderQueue()).
                to(deadLetterDirectExchange()).with(DEAD_LETTER_ROUTING_KEY);
    }

}